Mui and u

So basically if u WATCH DEMON SLAYER u would know that TANJIRO AND NEZUKO ARE SIBLINGS so basically it's diff where u and Muichiro were friends and one day his parents passed away so when he went to get food from the village u would stay and babysit his siblings one day his family an u got killed by Muzan but u got turns into a DEMON but a NICE DEMON! So this is when u met Rui and where u are tied in his strings bc u scratched him and Muichiro doesn't notice yet until ur blood drips on his sword and ur the girl in the pick also ur name is whatever u want u don't have to be the girl in the pic and basically u choose ur blood demon art and ya BYEEEEEEEE (ENJOY!)